I hit him on the head and I hit him on his head

I really want to know the differences between "I hit him on the head " and “I hit him on his head”. Please help me to explain them , thanks a lot:)

Hello, liliexeter-- and welcome to English-test.

No difference in meaning. The first is natural; the second is unnatural.

Thanks for your reply:)

Please remember that you shouldn’t hit anybody ;-)[YSaerTTEW443543]

TOEIC listening, question-response: Could you give me a hand with this luggage?[YSaerTTEW443543]